Of like the 6 or 7ish I've seen, Wolf Children: Ame and Yuki is my favorite. It's simply amazing. Hosoda > Miyazaki. Not really, but Hosoda, I feel, will be the next Miyazaki.
Princess Mononoke, Grave of the Fireflies, End of Evangelion, and Howl's Moving Castle. Oh yea, Inuyasha the Movie: The Castle Beyond the Looking Glass for nostalgia's sake. =D